HarmonyOS AES加解密报错17630001

export default class AESUtils {
  static async aesEncryptString(data: string): Promise<string> {
    let symKey = await genSymKeyByData(new Uint8Array(buffer.from('IaR90VTAdg2ZBRYT', 'utf-8').buffer));
    let plainText: cryptoFramework.DataBlob = {
      data: new Uint8Array(buffer.from(data, 'utf-8').buffer)
    };
    let encryptText = await encryptMessagePromise(symKey, plainText);
    return new util.Base64Helper().encodeToString(encryptText.data)
  }

  static async aesDecryptString(data: string): Promise<string> {
    let symKey = await genSymKeyByData(new Uint8Array(buffer.from('IaR90VTAdg2ZBRYT', 'utf-8').buffer))
    let plainText: cryptoFramework.DataBlob = {
      data: new Uint8Array(buffer.from(data, 'utf-8').buffer)
    };
    let decryptText = await decryptMessagePromise(symKey, plainText)
    return new util.Base64Helper().encodeToString(decryptText.data)

  }
}

async function encryptMessagePromise(symKey: cryptoFramework.SymKey, plainText: cryptoFramework.DataBlob) {
  let cipher = cryptoFramework.createCipher('AES128|CBC|PKCS7');
  let iv = genIvParamsSpec();
  await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, iv);
  let cipherData = await cipher.doFinal(plainText);
  return cipherData;
}

// 解密消息
async function decryptMessagePromise(symKey: cryptoFramework.SymKey, cipherText: cryptoFramework.DataBlob) {
  let decoder = cryptoFramework.createCipher('AES128|CBC|PKCS7');
  let iv = genIvParamsSpec();
  await decoder.init(cryptoFramework.CryptoMode.DECRYPT_MODE, symKey, iv);
  let decryptData = await decoder.doFinal(cipherText);
  return decryptData;
}

function genIvParamsSpec() {
  let ivBlob: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from('A-16-Byte-String', 'utf-8').buffer) };
  let ivParamsSpec: cryptoFramework.IvParamsSpec = {
    algName: "IvParamsSpec",
    iv: ivBlob
  };
  return ivParamsSpec;
}


async function genSymKeyByData(symKeyData: Uint8Array) {
  let symKeyBlob: cryptoFramework.DataBlob = { data: symKeyData };
  let aesGenerator = cryptoFramework.createSymKeyGenerator('AES128');
  let symKey = await aesGenerator.convertKey(symKeyBlob);
  return symKey
}

这套代码AES加密没问题，但是解密的时候会出现17630001这个code